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 * regarding copyright ownership.  The ASF licenses this file   *
 * to you under the Apache License, Version 2.0 (the            *
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package org.apache.james.imap.api;

import java.util.Optional;

import org.apache.james.imap.api.process.ImapSession;
import org.apache.james.mailbox.MailboxSession;

import com.google.common.base.Preconditions;

public class ImapSessionUtils {

    public static final String MAILBOX_USER_ATTRIBUTE_SESSION_KEY = "org.apache.james.api.imap.MAILBOX_USER_ATTRIBUTE_SESSION_KEY";

    public static final String MAILBOX_SESSION_ATTRIBUTE_SESSION_KEY = "org.apache.james.api.imap.MAILBOX_SESSION_ATTRIBUTE_SESSION_KEY";

    public static MailboxSession getMailboxSession(ImapSession session) {
        return (MailboxSession) session.getAttribute(ImapSessionUtils.MAILBOX_SESSION_ATTRIBUTE_SESSION_KEY);
    }

    public static String getUserName(ImapSession imapSession) {
        Preconditions.checkNotNull(imapSession);
        return Optional.ofNullable(getMailboxSession(imapSession))
            .map(mailboxSession -> mailboxSession.getUser().getUserName())
            .orElse(null);
    }
}
